Thank you for everything. You have made me aware of the importance of using seat belts while driving.
From my knowledge of the workings of seat belts.
When an accident occurs, the pretensioner mechanism will be active. The belt will be tightened to keep the body bounced. Seat belts and pretension systems can also be replaced, but should be careful as they are related to electronic systems in cars. Then after a few seconds, the power limiting mechanism works. The seat belt relaxes and exposes the body to a widespread airbag. This system works in harmony with the airbag. So the pretensioner mechanism and force-limiter mechanism work when the airbag expands.
The seatbelts do save lives.